County Changes Between 1940 and Present  Sep 7 2012
  La Paz County was established in 1983.
  Broomfield County was established in 2001.
  Ormsby => Carson City
New Mexico:
  Cibola County was establised in 1981.
  Los Alamos County was created in 1949 from Sandoval and Santa Fe Counties.
South Dakota:
  Washabaugh - merged with Jackson County in 1983.
  Armstrong - merged with Dewey County in 1952.
  Washington - disorganized in 1943.
  Elizabeth - merged with Hampton in 1952.
  Nansemond - independent city in 1972, merged with Suffolk in 1974.
  Princess Anne - merged with Virginia Beach in 1963.
  South Norfolk and Norfolk merged in 1963 to become Chesapeake.
  Warwick - independent city in 1952, merged with Newport News in 1958.
  Charles => Charles City.
  James => James City.

One Click for Browsing Families  Aug 19 2012
Browsing households at a location can now be done quickly. Once you hit the search button of the Family Search box, families meeting the criteria show up to the right. The default is to show 20 such results at a time. But it may be best to chose a small number, say '5 images per click', so that you can just hit the Next link to progress to the next group of families without the need to scroll.
The name and birthplace text fields are currently grayed-out -- that functionality will be brought online in September.

Autocomplete Features  Aug 19 2012
The Location textbox in the Family Search form takes fields: Local, County, State. To help in this an autocomplete feature is added. As soon as you type in two or more letters, the available 1940 locations appear as choices. Note that the census bureau often referred to cities with "City" attached at the end. So not only was Kansas City referred to as Kansas City, but also Chicago was referred to as Chicago City.

Colorized Forms  Aug 17 2012
Colorized forms have been added under the Browse Forms tab. This may make browsing forms easier. Families are separated by red lines, males have a blue background and females pink.

Draggable Forms  Aug 15 2012
When browsing through forms in a microfilm roll, it helps to have one image follow the next in a continuous fashion. The same effect is done here -- only dragging the image upward is needed to progress to the next image.Moreover, the next image starts loading into the browser before it is reached. Give it a try under the Browse Forms tab.

Household Sizes  Aug 9 2012
There were 132 million individuals enumerated in the 1940 census. What is lesser well known were the number of households of each size (roughly equivalent to the family size). I count 39,003,811 households enumerated. That's an average of 3.38 individuals per family. Here are the numbers of family units of each size.
# in Household Count
1 10,561,999
2 8,576,082
3 7,090,324
4 5,497,736
5 3,444,529
6 2,019,838
7 1,151,035
8+ 662,268
Total 39,003,811
ED and Block Maps  Aug 11 2012
I've added Street Maps showing the 1940 Enumeration Districts and Block Numbers. Go to 'Map of EDs', and input the modern-day street address. Enumeration Districts are shown in red, Block Numbers in blue.
Input a street address (number is optional), followed by the city and state. For example, Charlotte St, Detroit, Michigan or 10 Division St, New York, NY.

The Non-Standard Forms  Aug 8 2012
Along with the standard Population Schedule forms in the 1940 census, there were also Nonresident Schedules, Preliminary Population Schedules and Absent Household Schedules. These schedules were used infrequenly, perhaps one in a thousand. There were 1300 Nonresident Schedules filled out. I've grouped them here (click in the thumbnail for the full image). There were 1847 Preliminary Schedules, which can be seen here.

Image Sizes  Aug 8 2012
There were several different types of forms used in the 1940 census. The different types of forms can be separated based on their sizes, particularly their widths and height-to-width ratios. The image of the standard Population Schedule form used in the sttates is typically 7300 pixels wide. The images for the forms used in Guam and American Somoa are roughly 4500 pixels wide, the Virgin Islands 6000 pixels wide, and Alaska 7500 pixels wide. Below is a count of how many forms are 4300 pixels wide, 4400 pixels wide, 4500 pixels, etc.

Most of the state forms are rectangular in shape; the height is 75% of the width. Forms for Alaska are a bit flatter, with the height about 60% of the width. The territories of Hawaii, Panama Canal, Puerto Rico, and the Virgin Islands all had squarer-sized forms. Here is a count of how many forms had height-to-width ratios of 53%, 54%, etc.

Notice that there is a grouping of forms used in the states which are smaller -- sizes of about 5500 pixels wide and heights of about 57% of their widths. More on that in the next post.

The 30,000-byte website.  Aug 8 2012
This website is currently only about 30,000 bytes (not including the images or the editor's blog). Being a minimal-byte website, it should make for responsive user experiences over typical home-internet and mobile (smart-phones, tablet) bandwidth speeds.